<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <h3>@keyup.enter  →  监听键盘回车事件</h3>
    <input @keyup.enter="fn" v-model="username" type="text">
  </div>
  <script src="./vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        username: ''
      },
      methods: {
        fn(e){
          // if(e.key === 'Enter'){
          //   console.log('键盘回车的时候触发',this.username);
          // }
          
          console.log('键盘回车的时候触发',this.username)
        }
      }
    })
  </script>
</body>
</html>